Western Electric
Run rules on the sigma zones, not just the 3σ line.
A point beyond 3σ isn't the only signal — patterns like two of three points in zone A flag a process change before a single point ever breaches a limit.
What this method tells you
Western Electric is one of the analytical methods Niobia AI surfaces inside the spc & process control branch. The short readout is: A point beyond 3σ isn't the only signal — patterns like two of three points in zone A flag a process change before a single point ever breaches a limit.
Where it fits in Niobia
Niobia keeps this method connected to the surrounding workflow, so teams can move from control charts into adjacent methods without reformatting data or rebuilding the context from scratch.
Method-specific output, not just a screenshot
Niobia packages western electric alongside the rest of the spc & process control stack, so the result stays connected to the raw inputs, the upstream context, and the next method the team needs to run.
Frequently asked
What does Western Electric help a team understand?
Western Electric sits inside Niobia AI's spc & process control workflows and helps teams turn raw process, materials, or quality signals into a defensible engineering readout.
When should engineers use Western Electric?
Use Western Electric when the question is better answered by that specific method than by a generic summary: it provides the method-specific signal, tradeoffs, and context the broader workflow depends on.
What should I read alongside Western Electric?
The closest companion methods are X̄ / R chart, EWMA. Reading them together makes it easier to see how Niobia AI moves from one analytical method to the next.